/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/Stack/NiagaraStackFunctionInput.h
Gets the parameter handle which defined this input in the module.
const [FNiagaraParameterHandle](API\Plugins\NiagaraEditor\ViewModels\Stack\FNiagaraParameterHandle) & GetInputParameterHandle() const